“End of the line”

“Low-hanging fruit”

Tasks or opportunities that are easy to achieve.

“A dead end”

A situation with no progress or solution.

“No strings attached”

Without special conditions or obligations.

“Live and learn”

Used after learning from a mistake or experience.

“Nothing to write home about”

Not special or impressive.

“Nail down”

To finalize or clearly define something.

“Can’t make head or tail of”

To be unable to understand something.

“Night and day”

Completely different.